Finance
Real Return Calculator
Calculate the inflation-adjusted real return on any investment using the Fisher equation. Compares exact and approximate results.
Enter values above to calculate
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Real Return Formula (Fisher Equation)
Real = ((1 + Nominal) / (1 + Inflation) − 1) × 100
Approximation: Real ≈ Nominal − Inflation
The exact formula is more accurate for large rates. The approximation is close when both rates are small.
How to Use This Calculator
Choose which value to find — real return, nominal return, or inflation rate — then enter the other two. All rates are entered as percentages (e.g. enter 8 for 8%).
The calculator shows both the precise Fisher equation result and the common approximation for comparison.
Frequently asked questions
What is real return on an investment?
Real return is the investment return after adjusting for inflation. It measures the actual increase in purchasing power, unlike nominal return which ignores inflation.
What is the difference between nominal and real return?
Nominal return is the stated percentage gain on an investment. Real return subtracts the effect of inflation. An investment earning 8% nominally in a 3% inflation environment has a real return of about 4.85%.
What is the Fisher equation?
The Fisher equation states: (1 + Nominal) = (1 + Real) × (1 + Inflation). Rearranged, Real Return = ((1 + Nominal) / (1 + Inflation) − 1) × 100. The approximation Nominal − Inflation is commonly used for small rates.
Can real return be negative?
Yes. If inflation exceeds the nominal return, the real return is negative, meaning the investment lost purchasing power even though its dollar value grew.
Why does real return matter more than nominal return?
Nominal return can be misleading during high inflation. Real return shows whether your money is actually growing in terms of what it can buy, which is what matters for long-term wealth building.